Holder for gravers while being ground



(N0 Mod I FRANCIS.

HOLDER FOR GRAVERS WHILE BEING GROUND. No. 449,673. Patented Apr. 7,1891.

(1% IIHI] UNITED STATES PATENT OFFICE.

ALLAN E. FRANCIS, OF CLEVELAND, OHIO.

HOLDER FOR GRAVERS WHILE BEING GROUND.

SPECIFICATION forming part of Letters Patent No. 449,673, dated April 7,1891. Application filed January 24, 1890. Sen'al No. 338,030. No model.)

To all whom it play concern.-

Be it known that I, ALLAN E. FRANCIS, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinvented a certain new and useful Holder for Gravers while being Ground,of which the following is a specification.

This invention relates to a device for grinding gravers; and it consistsof the novel constructions and combination, substantially as hereinafterdescribed, and pointed out in the claim. To do this the holder II isturned on the post to one side, so as to present the graver sidewise onthe stone. Then by carrying the graver on the stone it maybe ground toan edge on the side. The holder may then be swung around to the oppositeside, the graduate indicating the same point on that side. The graver isthen ground to a fine edge 011 that side.

In the accompanying drawings, Figure 1 is a side elevation of my newholder for gravers, as seen in position for use. Fig. 2 is a top or planView of the same. Fig. 3 is an under side view to show an under sidegraduate.

A is a post standing upon a roller-carriage B.

C is a sleeve fitted to be carried by said post. It has a split sideprovided with lugs or ears 0 0, through which a screw passes forclamping the sleeve to the post. From the said sleeve an arm D extendshorizontally, its outer end being made in the form of a quadrant D Thecenter of said quadrant has a hub with a pin (l extendinghorizontallytherefrom on one side.

E is a sleeve, also split and provided with a clamping-screw c, fittedonto said pin (Z, and carries a graduated half-circle F, and on its topside is provided a pointer f for indicating on the graduate on thequadrant the angles to which the graver-holder should be set fordressing the face and heel of a graver. The

graduated half-circle is for indicatingin similar way how to dress thesides of graver-point. Depending from sleeve E is a post E to which thegraver-holder H is attached.

The holder I make the subject of a separate application, Serial No.338,032, filed January 24, 1890.

The manner of using this device is as follows: The holder is removedfrom the graverstock with the graver still in it and is attached to thepost E of the plane, and the sleeve C adjusted on the post A to properheight, (indicated by the graduate thereon,) and the sleeve E adjustedto the angle desired, as indicated by the pointer on quad rant-graduate,and the holder also adjusted to desired position, as indicated by theunder scale. The plane is now placed upon the stone for grinding, asseen in Fig. 1, the roller-carriage B riding on the stone as the planeis pushed back and forth.

It will be seen from the foregoing that this device is convenient andreadily adjusted for the purpose of perfectly dressing all the facets ofa graver.

Having described my invention, I claim- The holder for gravers,consisting of post A and carriage B, split sleeve 0, having clampscrewand supported on said post A and provided with arm D, carrying graduatedquadrant D having pin (1, the split sleeve E, provided with aclamp-screw and supported on pin d and having graduated half-circle Fand pointerf, and the depending post E carrying tool-holder H, allconstructed and combined to operate substantially as described.

ALLAN E. FRANCIS. l-Vitnesses;

GEO. W. TIBBITTs, ABNER SLUTZ.

